JPH04110794U - Paper passing device - Google Patents

Abstract

(57) [Summary] [Purpose] While the tail is passing through the paper, surface contact is made with the felt instead of the conventional line contact between the rope and wet paper, eliminating the possibility of the tail coming off, making it possible to securely hold and convey the tail. Make it. [Structure] In a sheet passing device for a single run dryer in which a sheet of felt 3 is stretched across a plurality of dryer rolls 2 arranged in a plurality, a narrow felt run 4 is provided for holding the tail 1 together with the felt 3, At least in the linear traveling portion of the tail 1 which is not wound around the dryer roll 2, the tail 1 is conveyed while being held between two felts 3 and 4.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a paper passing device for a dryer section of a paper machine.

0002

[Conventional technology]

FIG. 5 schematically shows a paper passing device for a conventional paper machine multi-tube dryer. Pre-work in the diagram The wet paper (tail) 1 dehydrated in the press part enters the dryer part and is steamed. It is crimped with felt 3 to dryer roll 2 which uses air as a heat source, and is heated to a specified moisture content. The product is heated and dried repeatedly until it becomes dry, and then sent to the calendering part in the subsequent process.

0003 Conventional paper feeding is not done at the full width, but at a narrow width called the tail. It will be held in Conventionally, two carrier ropes were used for this tail paper feeding, as shown in Figure 5. 8, a method was adopted in which the tail was pinched and transferred. In other words, in the example of Figure 5, the dry Add a rope groove to the operating end of the roller roll 2 and suction roll 5 (outside the regular paper width). Two carrier ropes 8, 8 are laid across this groove along the running path of the wet paper. It is. The tail 1 is moved outward when passing the paper, and the tail 1 is moved to the outside when passing the paper, and the tail 1 The paper is caught in the cup and passed through the dryer part. In addition, 6 is a felt row 7 is a doctor.

0004

[Problem that the idea aims to solve]

The conventional paper passing device passes the tail 1 with two carrier ropes 8, 8 as shown in Fig. 5. It was meant to be held and transported. However, when holding wet paper between two ropes 8, 8, The contact area between the ropes 8, 8 and the wet paper is a line contact and has only a very weak holding force. do not have. Therefore, the tail was transferred several times inside the dryer part over a length of 100 meters. The tail 1 may come off the carrier rope 8 while being transferred while turning it. It happened often. The tail that comes off the carrier rope will not be transported any further. , it wraps around the dryer roll 2 or becomes small pieces and is attached to the dryer roll 2 or the felt 3. It had the disadvantage of flying around for hours on end. Therefore, these removal processes are performed to re-open the It took a considerable amount of time to print paper, which was one of the factors that reduced operational efficiency. .

[0005] The present invention has been proposed to solve the above-mentioned conventional problems.

[0006]

[Means to solve the problem]

For this reason, the present invention involves stretching a single piece of felt over multiple arrays of dryer rolls. In the paper passing device of a single-run dryer, the tail is Equipped with a narrow felt run for clamping, and at least not wound into a roll. In the straight-line traveling part of the tail, the tail is held between the two felts and transported. It is intended to be used as a means to solve problems.

[0007]

[Effect]

The tail exiting the final press is made up of a narrow paper-feeding felt and a full-width felt. Wind the multiple dryer rolls and suction rolls while the rollers are held in place. Ku. While the tail is passing through the paper, the contact between the tail and the felt is surface contact, ensuring reliable The tail can be held and transported.

[0008]

【Example】

The present invention will be described below with reference to the embodiments shown in the drawings. Figures 1 to 4 are examples of the present invention. shows. In the figure, 1 is wet paper, 2 is dryer roll, 3 is felt, and 5 is suction roller. 6 is a felt roll, and 7 is a doctor, which are the same as the conventional one shown in FIG. It is.

[0009] Below, the differences between the first embodiment of FIGS. 1 to 3 and FIG. 5 will be explained. The wet paper (tail) 1 that has come out of the final press 9 is passed through a narrow width felt 4 and a full width felt. A plurality of dryer rolls 2 and suction are arranged while being held by Elt 3. Wind roll 5. At this time, the positional relationship between both felts 3 and 4 and tail 1 is as follows: The states shown in FIGS. 2 and 3 are obtained on the dryer roll 2 and the suction roll 5, respectively. . The position A in FIGS. 2 and 3 indicates the normal paper edge (tail edge) position, and When using paper, bring the tip of the tail closer to the felt end position B, and then Let it bite into Lutnip.

0010 In addition to the above-mentioned means, paper passing means using the paper passing device of the present invention include the tail position. This is a method of setting the paper edge outside the normal paper edge position and resetting the paper width to the normal paper width after paper feeding is complete. On the other hand, a method may be considered in which the paper passing felt 4 is moved inward only when paper is passed. Ma In the intergroup part of the felt run, two suction rolls 5, 5 are driven as shown in Fig. 4. By placing the tail 1 between the lyre rolls 2 and 2, the tail 1 is held by the vacuum. We are doing delivery in a state.

[0011]

[Effect of the idea]

As explained in detail above, according to the present invention, when paper passes through the dryer part of the paper machine, The retention condition of the dryer tail has been greatly improved, and the tail between the dryer roll groups has been significantly improved. This makes paper transfer smoother, eliminating the possibility of tails falling off and ensuring reliable paper passing. It becomes possible. As a result, the time required to feed paper is shortened and operational efficiency is greatly improved. .

[Brief explanation of drawings]

FIG. 1 is a system diagram showing the flow of wet paper paper and felt in a paper passing device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a paper passing section on the dryer roll in FIG. 1;

FIG. 3 is a sectional view of a paper passing section on the suction roll in FIG. 1;

FIG. 4 is a detailed sectional view of main parts in FIG. 1.

FIG. 5 is a system diagram showing the flow of wet paper and felt in a conventional paper passing device.

[Explanation of symbols]

1 Wet paper (tail) 2 Dryer roll 3 felt 4 Felt for paper passing 5 Suction roll 6 felt roll 7 Doctor

Claims (1)

[Scope of utility model registration request] 1. A paper passing device for a single-run dryer in which a sheet of felt is stretched across a plurality of dryer rolls arranged, comprising a narrow felt run for holding a tail together with the felt, and at least a roll of dryer rolls. In the straight running part of the tail that is not wrapped around the tail, the tail is
A paper feeding device that is characterized in that paper is conveyed by being held between sheets of felt.